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Published Article / I08/2003/I-067 ENY-ARTICLE-2008-151

Real-time Implementation of Adaptive Amplitude Estimators for Protection and Control Purposes.

Rebizant, W (Wroclaw University of Technology, Poland) ; Staszewski, J (Wroclaw University of Technology, Poland) ; Lee, S J (Next-Generation Power Technology Center, Myongji University, Yongin, Korea) ; Kang, S H (Next-Generation Power Technology Center, Myongji University, Yongin, Korea)


Abstract: In the paper a new fast and adaptive scheme for measurement of signal amplitude for protection and control purposes is presented. The algorithm developed is intended for amplitude tracking of the distorted sinusoidal signals with varying frequency. Wide frequency band features of the estimator are obtained by adaptive on-line changes of the orthogonal filter parameters (data window length) and coefficients in the measurement equations according to the observed actual frequency being tracked with special but simple digital procedure. The developed algorithms have been tested with MATLAB and EMTP-ATP generated signals. Practical implementation of the adaptive scheme on the TMS signal processor is described in the paper. The real-time tests have shown that the time required for execution of all equations of the adaptive estimator within one time-step was equal to 0.14ms, which allows working with the sampling frequency set to 7kHz. That means that real-time application of the adaptive algorithm for estimation of amplitude of both currents and voltages is utterly attainable.

Keyword(s): signal amplitude ; real-time algorithm ; FFT ; window function ; signal processor
Note: Aktualne problemy w elektroenergetyce. APE '03. XI Międzynarodowa konferencja naukowa, Jurata, 11-13 czerwca 2003. T. 2. , pp. 255-262.

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Record created 2008-06-03, last modified 2008-06-04

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